Current Tunnelling Activities
NEW ZİGANA TUNNEL
The New Zigana Tunnel project in Turkey is currently under construction and when it is completed it will have 14,5 km length. The two lane tunnel will connect Gümüşhane and Trabzon provinces in Turkey’s north east, and will be located at an altitude of over 1.200 m above sea level. The construction of the tunnel will replace the existing route over the Zigana Pass, which reaches an altitude above sea level of 2.032 m. The project consists of 2 x 14.500 m long tunnel and 600 m connection roads. Upon completion of the tunnel, the existing road will be shortened by 8 km.
Rize and Erzurum provinces is connected by the double tube 7.105 m long Kırık Tunnel Project. Upon completion of the tunnel, the existing road will be shortened by 33 km.
A total of 10.286 m excavation and support works were completed in the 5.905 m long double tube Eğribel Tunnel. The Tunnel will connect Şebinkarahisar and Dereli in Giresun province. Upon completion of the tunnel, the existing road will be shortened by 6,5 km.
A total of 4.231 m excavation and support works were completed in the 2.945 m long double tube Salarha Tunnel in the Black Sea Region. Upon completion of the tunnel, the existing road will be shortened by 8,75 km.
The 2.246 m long single tube Prinkayalar Tunnel is connecting the cities of Erzurum and Artvin.
MEDITERRANEAN COASTAL ROAD TUNNELS
The Mediterranean Coast Road between Mersin and Antalya is 446 km long. The project includes 34 tunnels (39,8 km). The construction of 16 tunnels (10.037 m) has been completed to date.
The 124 km long road project includes 13 tunnels (17.691 m). 9 tunnels (11.121 m) were completed. However, 3 of the tunnels (2.530 m) have not been opened to traffic yet as they are on the variant route. Excavation support works in T1 (1.402 m) tunnel and final concrete pavement works in T3 (3.678 m) tunnel are in progress.
MUT AXIS TUNNELS
There are 8 tunnels (2 x 10.798 m) on the 112 km long road. T6 Tunnel (2 x 1.023 m) was completed in 2018.
ORDU FREEWAY TUNNELS
The total length of the 6 double tube tunnels on the Ordu Freeway, which is 21,4 km long, is 2 x 9.491 m. About 45 minutes time savings will be obtained upon completion of the road. Electromechanical production of Boztepe (2 x 3.311 m) and Öceli (2 x 2.019 m) tunnels continues. Works are continuing in 4 double tube tunnels (Terzili-T1-T2-T3) with a length of 2 x 4.162 m. In the Terzili Tunnel (2 x 1.180 m), excavation and support works have been completed in 1.157 m.
ÇANAKKALE-EZİNE-AYVACIK-KÜÇÜKKUYU ROAD, AYVACIK-KÜÇÜKKUYU TUNNELS
Çanakkale-Ezine-Ayvacık-Küçükkuyu Road, Ayvacık-Küçükuyu section has two double tube tunnel. T1 Tunnel has a length of 1.693 meters and T2 Tunnel has a length of 4.021 meters. The completion of the tunnels will shorten the road by a total of 3,1 km.
YALOVA-ÇINARCIK-ARMUTLU ROAD TUNNELS
Yalova-Çınarcık-Armutlu Road has 6 single tube tunnels with a total length of 1 x 5.894 m. Excavation and support works continue in 3 tunnels. Upon completion of the tunnels, there will be a shortening of 600 m on the road.
The double lane tunnel (2 x 3.137 m) at the Güzeldere crossing of the Van-Başkale Highway is a total of 6.274 m in length.
When the 2 x 6.500 m Kop Tunnel on the Erzurum-Bayburt Road is completed, the access of the Gürbulak Border Gate to the Trabzon Port will be easier. With the completion of the tunnel, economic and social structures of the Black Sea, Eastern Anatolia and Southeastern Anatolia will be greatly improved.
The 2 x 3.105 m long Dallıkavak Tunnel is located on the Erzurum-İspir Road. Upon completion of the tunnel, the existing road will be shortened by 4.4 km. One of the highest crossings of Erzurum-İspir Road, Dallıkavak crossing is at an altitude of 2.359 m and the traffic flow stops from time to time due to reasons such as snowfall in winter.
The Geminbeli Tunnel, which is on the road which constitutes an alternative to the connection between Central Anatolia and the Black Sea Region, has a length of 2 x 4.280 m and is located at the Geminbeli Pass at an altitude of 2.010 m. The project will shorten the road length by 3 km and travel time by 20 minutes.
Ilgar Tunnel is located on (Ardahan-Çıldır) Separation - Hanak-Damal Route. There are 2 x 4,9 km long double tube tunnel within the project. With the completion of the Ilgar Tunnel, the route will be shortened by 5 km.
The Yağdonduran Tunnel at the 1.750 m altitude Yağdonduran Pass on Sivas-Malatya Road is 2 x 1.567 m long. The tunnel shortens the existing road by 1,5 km and lowers the elevation by 75 m.
The Dolmabahçe-Levazım Tunnel in İstanbul is the first tunnel of the Dolmabahçe-Kilyos Tunnels Project. The works of this 3.872 m long double tube tunnel are continuing.
DUDULLU-BOSTANCI METRO LINE
The Dudullu-Bostancı Metro Line in İstanbul will be 14 km long. The journey will take 21 minutes with the Dudullu-Bostancı Metro Line, which will have 13 stations. With the connection to be made at Kozyatağı Station, transfer to Kadikoy-Pendik Metro Line will be provided.
AYAŞ RAILWAY TUNNEL
In the Ayaş Railway Tunnel (10.064 m) in Ankara, the longest railway tunnel in Turkey and the sixth in the world, total of 8.400 m (including 400 m long cut-and-cover part) excavation and final concrete lining works were completed. The tunnel is constructed using the New Austrian Tunnelling Method.
OTHER RAILWAY TUNNELS
The construction works of the T26 Tunnel, which is located at the Bilecik-Bozüyük part of the Ankara-İstanbul High Speed Railway Line, are continuing.
The construction works of the 10.000 m long double tube Nurdağ Tunnel, which is a part of the Mersin-Adana-İncirlik-Osmaniye-Gaziantep High Speed Railway Project, are continuing. Works are continuing at the remaining 650 meters in the tunnel, of which 9.350 meters have been completed.
İSKİ EUROPE 2ND REGION 2ND PART WASTEWATER TUNNEL
A wastewater tunnel is being constructed to transfer wastewater from the Küçükçekmece Wastewater Pretreatment Plant to the existing Ambarlı Advanced Biological Wastewater Treatment Plant in Beylikdüzü (İstanbul). Within the scope of the project, a wastewater tunnel with an internal diameter of 2,2 m and a length of 6.438,28 m and a shaft of 91 m depth with a diameter of 7,5 m are constructing.
İSKİ KAĞITHANE-SEFAKÖY DRINKING WATER TUNNEL
The İSKİ Kağıthane-Sefaköy Drinking Water Tunnel Project in İstanbul consists of two lines. Line 1 which is 7,7 km length is between Kağıthane-Eyüp (Münzevi) districts. Line 2 which is 13,1 km length is between İslambey-Sefaköy districts. The 19,56 km part of the 20,81 km long water tunnel line will be excavated using TBM, the rest will be excavated using NATM or SEM.
YUSUFELİ DAM AND HEPP PROJECT TUNNELS
The Yusufeli Dam and Hydroelectric Power Plant Project is located on Çoruh River in the Eastern Black Sea Region, 70 km to the southwest of Artvin. It will be the highest dam in Turkey and the world’s third highest dam in the double curvature concrete arch dam type by its height of 275 meters when completed. The total water storage volume of the dam is approximately 2,2 billion cubic meters. 1.888 billion kWh energy will be generated annually at the power plant, where the planned installed power is 558 MW. Concreting works are continued at the dam embankment that has a mass concrete volume of 4 million cubic meters. Furthermore, construction activities are continued for the energy tunnel, power plant building, switchyard GIS building, embankment injection and drainage galleries. Water retention at Yusufeli Dam is planned to be realized at the end of 2020.
TUNNELS: Within the scope of Yusufeli and HEPP Project, 72 km new roads, 39 tunnels (total tunnel length is 55 km), 25 bridges (4 of them are special design bridges and total bridge length is 4,11 km) and 99 box culvert have being built.
HELEZONIC TUNNELS: Yusufeli Dam and HEPP project has extreme geological conditions. Due to difficult heterogeneous geological surface in such a steep location, it was not possible to reach the starting points of slopes with open-field excavations. Thus transportation to right bank slope at elevation 450 m from foundation level and transportation to every 15 meters above the crest was provided with helix-shaped tunnels having 17% inclination. All staff, equipment and machines were transferred via these tunnels and the excavation started.
BABAKAYA AND SİLVAN IRRIGATION TUNNELS
Within the scope of Southeastern Anatolia Project, Babakaya and Silvan Tunnels are being built in order to bring water from the Silvan Dam under construction. Babakaya Tunnel is 5.320 m long, 7 m inner diameter with two tubes. Silvan Tunnel, which will carry 212 m3 of water per second, is constructing as a single tube with a length of 13,4 km and a diameter of 10 meters. The water in the dam will be transferred to the 97,6 km long main canal through the Silvan and Babakaya Tunnels.
HADİMİ IRRIGATION TUNNEL
Hadimi Tunnel in Konya is the 18.136 meters long tunnel that will transfer the water stored in Afşar Dam to Bağbaşı Dam. Hadimi Tunnel is one of the biggest project of the region and Turkey. 11.505 meters of the tunnel is excavated by TBM and 6.631 meters of the tunnel is opened by conventional drill and blast method.